When I asked about this when I was going to move house, BT told me to leave it installed (wall mounted) and they would install a new one at the new house, but I was told to take the HH3 which I don't use anyway.
BT Infinity
ROUTER:-Netgear WNDR37AV
JDSU Stats
Attainable 94040D 34659U
Sync 79999D 20000U
Attenuation: 10.1 SNR: 16.2
Line Length 300meters